Any Color You Like!
A good example of the craziness of RV wiring colors…
From one of the RV groups I belong to
Here’s a good example of the craziness of Airstream wiring. Besides the mess of unlabeled, unsecured wires, here you have the positive output of the solar charge controller (black wire) going to the 12-Volt DC distribution box “hot” bus. Along the way, someone has spliced the black wire onto a green wire before it goes into the box. If you go back up to the charge controller’s input wires, the green wire is the ground or negative wire!
So the green wire is negative except when it’s positive, and the black wire is positive except when it is negative. :/
- Jt Long
Everyone
This is just one of the reasons that troubleshooting RV electrical systems can be so confusing and time consuming. Assume nothing…
Let’s play safe out there… Mike
I'm a marine electrician and work on RV's as well. Lots of people whine about ABYC standards, but every time I dig into an RV upgrade I am so grateful that they're there. RV wiring is the wild west. There ARE no standards that specify wire color, type, terminations, ampacity, overcurrent protection, and so on. The industry needs electrical standards, as electrical systems become more and more complex.
That is what I call "RV Wiring and the Nightmare of Confusion", heck the red/black, black/white wiring to the battery is enough to screw up most people.